<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
    <link rel="stylesheet" href="test2.css">
</head>
<body>

<div class="tab">
    <div class="tabDiv">
    <span class="tabItem">选项卡1</span>
    <div>
       <div> 阿斯顿发生发</div>
    </div>
    </div>

    <div class="tabDiv">
    <span class="tabItem">选项卡2</span>
        <div>
            <div> 阿斯顿asdfasfasdfas发生发 </div>
        </div>
    </div>

    <div class="tabDiv">
    <span class="tabItem">选项卡3</span>
        <div>
            <div> dfasdfasdfasdfasdfasadfafs</div>
        </div>
    </div>
</div>

<div style="width: 1000px;height:500px;background-color: #0033FF; "></div>

</body>
</html>